High-temperature fused salt storage tank capable of freely stretching out and drawing back to release thermal stress

Abstract

The invention discloses a high-temperature fused salt storage tank capable of freely stretching out and drawing back to release thermal stress. The high-temperature fused salt storage tank comprises a tank body, a bottom plate of the tank body is in a cone shape with an upward cone angle, a sand cushion layer formed by sand filling is arranged in the middle of the lower portion of the tank body, the upper portion of the sand cushion layer is a cone-shaped body with the upward cone angle, a leak hunting bottom plate is arranged below the sand cushion layer, and a plurality of thermocouples for measuring temperature are arranged on the leak hunting bottom plate. The multiple thermocouples are electrically connected with an electrical control device, a liquid collecting tank is arranged around the outer side edge of the leak hunting bottom plate, the lower portion of the liquid collecting tank is connected with the liquid inlet of a liquid discharging pipe, and the liquid outlet of the liquid discharging pipe communicates with a fused salt collecting tank. According to the high-temperature fused salt storage tank capable of freely stretching out and drawing back to release the thermal stress, free stretching out and drawing back of the storage tank can be effectively guaranteed, the thermal stress is released, therefore, the operation safety of the storage tank is guaranteed, the fused salt leakage phenomenon can be found in time, leaked fused salt is recycled, and pollution to the environment is avoided.

Description

technical field [0001] The invention relates to the field of solar thermal power generation, in particular to a high-temperature molten salt storage tank that can be freely expanded and contracted to release thermal stress. Background technique [0002] One of the challenges in harnessing renewable energy, especially solar energy, is dealing with intermittency in energy supply caused by weather, diurnal sunlight fluctuations, and seasonal variations. One way to effectively manage the variability of the solar resource is to add Thermal energy storage device, when there is surplus power, the changed energy is stored, and then when the power generated by solar energy is insufficient or not generated, the stored energy is released, so as to meet the demand for continuous power supply. [0003] Solar thermal storage technology mainly uses molten salt storage tanks. At present, the basic structure design of the bottom of molten salt storage tanks has always been a difficult point ...

AI Technical Summary

Problems solved by technology

The basic structure of the usual high-temperature molten salt storage tank is that the bottom plate of the molten salt storage tank is directly in contact with the concrete ring wall. The friction coefficient of the contact surface of such a structure is large, which is not conducive to the free expansion and contraction of the molten salt storage tank, and it is easy to cause the bottom plate and the wall The cracking of the large fillet weld at the joint of the plate poses a great hidden danger to the safety of the storage tank

[0004] In addition, the molten salt storage tank still has leakage phenomenon, which makes the molten salt storage tank unable to be used normally and causes serious pollution to the environment. How to quickly detect the molten salt leakage is a key issue in this field at present

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